[bodaudinh]

I think at right top of site always better. Because it maybe over login form, you can not enter anything into login form.

By the way, If you want, u can edit nice.js
Find (x2)

style="position:absolute;

replace to (x2)

style="position:relative;

And put $adscorner into below

    <td class="contentwrap">
<!-- content table $ad_location[ad_header_end] -->
$adscorner

(in header template)